Ha, I just did the same with my 5wt. $20 SA line. Figured good to practice with and should be better than the 20 year old line I had on the reel. OMG! I feel like a stud casting that thing. I believe my old line was past its useful life
I bought a reel from a member here and he included this line with it. He didn't know how much use it had but it was free. I used it throwing some decent sized streamers on my Douglas LRS 8 weight and it did just fine.